Sökning: "Richard Holt"

Hittade 2 avhandlingar innehållade orden Richard Holt.

1. 1. High Resolution Spectroscopy of Singly Charged Ions : Applications of Laser and Fourier Transform Techniques

   Författare :Jonas Gurell; Sven Mannervik; Richard Holt; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atomic physics; Atomfysik; fysik; Physics;

   Sammanfattning : This thesis presents measurements of fundamental properties of singly charged ionic systems including spectral wavelengths, lifetimes of excited states and branching fractions with the main focus on time resolved laser spectroscopy of stored ions providing lifetime measurements of metastable states. The results of these measurements have been used to determine energy levels and transition probabilities of the studied systems. LÄS MER

3. 2. The response of model food webs to species loss : secondary extinctions and relaxation times

   Författare :Charlotte Borrvall; Richard Law; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : Current destruction and fragmentation of natural habitats is predicted to cause great future losses in biodiversity (Pimm et al. 1995; Hughes et al. 1997; Sala et al. 2000). LÄS MER